﻿#region Copyright
//————————————————————————————————————————//
//	创建人员(Creator)    ：Huangyd
//	创建日期(Date)       ：2012-07-04
//  联系方式(Email)      ：aj-ayumi@163.com; gajayumi@gmail.com; ajayumi@me.com
//  描    述(Description)：
//
//	Copyright (C) 2012 ajayumi 版权所有
//————————————————————————————————————————//
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;

namespace ajayumi.Platform.Win.DataGridView
{
    /// <summary>
    /// 创建日历列。
    /// 此列的单元格在普通的文本框单元格中显示日期，但当用户编辑单元格时，就会出现 DateTimePicker 控件。 
    /// 为了避免必须再次实现文本框显示功能， CalendarCell 类从 DataGridViewTextBoxCell 类派生，
    /// 而不是直接从 DataGridViewCell 类继承。 
    /// </summary>
    public class DataGridViewCalendarColumn : DataGridViewColumn
    {
        internal const string CUSTOM_FORMAT = "yyyy-MM-dd";

        public DataGridViewCalendarColumn()
            : base( new DataGridViewCalendarCell())
        {          
        }

        public override DataGridViewCell CellTemplate
        {
            get
            {
                return base.CellTemplate;
            }
            set
            {
                // Ensure that the cell used for the template is a CalendarCell.
                if (value != null &&
                    !value.GetType().IsAssignableFrom(typeof(DataGridViewCalendarCell)))
                {
                    throw new InvalidCastException("Must be a DataGridViewCalendarCell");
                }
                base.CellTemplate = value;
            }
        }
    }

    public class DataGridViewCalendarCell : DataGridViewTextBoxCell
    {
        public DataGridViewCalendarCell()
            : base()
        {
            this.Style.Format = DataGridViewCalendarColumn.CUSTOM_FORMAT;
        }

        public override void InitializeEditingControl(int rowIndex, object
            initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        {
            // Set the value of the editing control to the current cell value.

            base.InitializeEditingControl(rowIndex, initialFormattedValue,
                dataGridViewCellStyle);
            DataGridViewCalendarEditingControl ctl =
                DataGridView.EditingControl as DataGridViewCalendarEditingControl;

            DateTime dateTime = DateTime.Now;
            if (null != this.Value && !string.IsNullOrEmpty(this.Value.ToString()))
            {
                DateTime.TryParse(this.Value.ToString(), out dateTime);
            }
            ctl.Value = dateTime;
        }

        public override Type EditType
        {
            get
            {
                // Return the type of the editing contol that CalendarCell uses.
                return typeof(DataGridViewCalendarEditingControl);
            }
        }

        public override Type ValueType
        {
            get
            {
                // Return the type of the value that CalendarCell contains.
                return typeof(DateTime);
            }
        }

        public override object DefaultNewRowValue
        {
            get
            {
                // Use the current date and time as the default value.
                return DateTime.Now;
            }
        }
    }

    internal class DataGridViewCalendarEditingControl : DateTimePicker, IDataGridViewEditingControl
    {
        System.Windows.Forms.DataGridView dataGridView;
        private bool valueChanged = false;
        int rowIndex;

        public DataGridViewCalendarEditingControl()
        {
            InitCustomFormat();
            this.Format = DateTimePickerFormat.Custom;
        }

        protected virtual void InitCustomFormat()
        {
            if (string.IsNullOrEmpty(this.CustomFormat))
            {
                this.CustomFormat = DataGridViewCalendarColumn.CUSTOM_FORMAT; ;
            }
        }

        // Implements the IDataGridViewEditingControl.EditingControlFormattedValue 

        // property.

        public virtual object EditingControlFormattedValue
        {
            get
            {
                return this.Value.ToString(this.CustomFormat);
            }
            set
            {
                if (value is String)
                {
                    this.Value = DateTime.Parse((String)value);
                }
            }
        }

        // Implements the 

        // IDataGridViewEditingControl.GetEditingControlFormattedValue method.

        public object GetEditingControlFormattedValue(
            DataGridViewDataErrorContexts context)
        {
            return EditingControlFormattedValue;
        }

        // Implements the 

        // IDataGridViewEditingControl.ApplyCellStyleToEditingControl method.

        public void ApplyCellStyleToEditingControl(
            DataGridViewCellStyle dataGridViewCellStyle)
        {
            this.Font = dataGridViewCellStyle.Font;
            this.CalendarForeColor = dataGridViewCellStyle.ForeColor;
            this.CalendarMonthBackground = dataGridViewCellStyle.BackColor;
        }

        // Implements the IDataGridViewEditingControl.EditingControlRowIndex 

        // property.

        public int EditingControlRowIndex
        {
            get
            {
                return rowIndex;
            }
            set
            {
                rowIndex = value;
            }
        }

        // Implements the IDataGridViewEditingControl.EditingControlWantsInputKey 

        // method.

        public bool EditingControlWantsInputKey(
            Keys key, bool dataGridViewWantsInputKey)
        {
            // Let the DateTimePicker handle the keys listed.

            switch (key & Keys.KeyCode)
            {
                case Keys.Left:
                case Keys.Up:
                case Keys.Down:
                case Keys.Right:
                case Keys.Home:
                case Keys.End:
                case Keys.PageDown:
                case Keys.PageUp:
                    return true;
                default:
                    return !dataGridViewWantsInputKey;
            }
        }

        // Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit 

        // method.

        public void PrepareEditingControlForEdit(bool selectAll)
        {
            // No preparation needs to be done.

        }

        // Implements the IDataGridViewEditingControl

        // .RepositionEditingControlOnValueChange property.

        public bool RepositionEditingControlOnValueChange
        {
            get
            {
                return false;
            }
        }

        // Implements the IDataGridViewEditingControl

        // .EditingControlDataGridView property.

        public System.Windows.Forms.DataGridView EditingControlDataGridView
        {
            get
            {
                return dataGridView;
            }
            set
            {
                dataGridView = value;
            }
        }

        // Implements the IDataGridViewEditingControl

        // .EditingControlValueChanged property.

        public bool EditingControlValueChanged
        {
            get
            {
                return valueChanged;
            }
            set
            {
                valueChanged = value;
            }
        }

        // Implements the IDataGridViewEditingControl

        // .EditingPanelCursor property.

        public Cursor EditingPanelCursor
        {
            get
            {
                return base.Cursor;
            }
        }

        protected override void OnValueChanged(EventArgs eventargs)
        {
            // Notify the DataGridView that the contents of the cell

            // have changed.

            valueChanged = true;
            this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }

}
